Use host IP

[zenire]

ISSUE TYPE

• Feature Idea

DIONAEA VERSION

Dionaea Version 0.8.0
Compiled on Linux/ARM at Sep 11 2018 18:59:54 with gcc 5.4.0 20160609
Started on 7aee16fe4d68 running Linux/armv7l release 4.14.50-v7+

CONFIGURATION

listen.mode=getifaddrs listen.use_ipv4_mapped_ipv6=false

ftp activated as service and ihandler

OS / ENVIRONMENT

• Ubuntu 16.04 (ARM)

SUMMARY

Active FTP works when Dionaea runs in a Docker container, but Passive doesn't.

STEPS TO REPRODUCE

Connect to the FTP service via passive mode.

EXPECTED RESULTS

Opdracht: 	PASV
Antwoord: 	227 Entering Passive Mode (Docker Host IP,189).

Docker Host IP should be the IP of the device which runs docker and hosts the container.

ACTUAL RESULTS

Opdracht: 	PASV
Antwoord: 	227 Entering Passive Mode (172,17,0,3,158,189).

The container IP is being returned. The connecting client can't reach the docker container's IP since it doesn't has a route to it.

SUGGESTION

Create a parameter in dionaea.cfg where you can enter the IP of the docker host. This IP should be returned for passive mode (and maybe at other places for other sensors too).